Lakes.
Echoing what bigfo and rufus said, the Lakes are the warmest winter boots I've ever owned. They're too warm to wear above freezing. Absolutely waterproof too. I wear regular socks down to 12°F or 15°F (-9 to -11°C) or so, then add a second pair of regular socks. That gets me down to at least 2°F (-17°C), the coldest it's gotten around here since I bought them.